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Medientyp:
E-Artikel
Titel:
Domain Decomposition with Nonmatching Grids: Augmented Lagrangian Approach
Beteiligte:
Le Tallec, Patrick;
Sassi, Taoufik
Erschienen:
American Mathematical Society, 1995
Erschienen in:
Mathematics of Computation, 64 (1995) 212, Seite 1367-1396
Sprache:
Englisch
ISSN:
0025-5718;
1088-6842
Entstehung:
Anmerkungen:
Beschreibung:
We propose and study a domain decomposition method which treats the constraint of displacement continuity at the interfaces by augmented Lagrangian techniques and solves the resulting problem by a parallel version of the Peaceman-Rachford algorithm. We prove that this algorithm is equivalent to the fictitious overlapping method introduced by P.L. Lions. We also prove its linear convergence independently of the discretization step h, even if the finite element grids do not match at the interfaces. A new preconditioner using fictitious overlapping and well adapted to three-dimensional elasticity problems is also introduced and is validated on several numerical examples.